Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 6: Ultracold atoms and molecules
Q 6.5: Vortrag
Montag, 18. März 2013, 12:15–12:30, A 310
Vacuum-Induced Coherence in Ultracold Molecules — •Sumanta Das1,2, Arpita Rakshit1, and Bimalendu Deb1 — 1Department of Material Sciences, IACS, Kolkata 700032, India — 2Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany
We show that coherence between two excited rovibrational states belonging to the same molecular electronic configuration arises quite naturally due to their interaction with the electromagnetic vacuum [1]. For initial preparation of a molecule in the desired rovibrational states, we propose to employ the method of ultracold photoassociation. Spontaneous decay of the excited molecule then gives rise to vacuum-induced coherence between the excited ro-vibrational states. We demonstrate theoretically an interesting interplay of effects due to vacuum-induced coherence and photoassociation. We apply our theory to photoassociation of bosonic ytterbium (174Yb) atoms, which appear to be a promising system for exploring such interplay [2,3]. The effects discussed here can be important for controlling decoherence and dissipation in molecular systems.
[1] S. Das, A. Rakshit and B. Deb, Phys. Rev. A 85, 011401(R) (2012).
[2] S. Tojo et al., Phys. Rev. Lett. 96, 153201 (2006).
[3] M. Borkowski et al., Phys. Rev. A 80, 012715 (2009).